Machine for tying knots in spiral springs



Oct. 9, 1928. 1,687,476

l DpHANAUER MACHINE FOR TYING KNO'lS IN SPIRAL SPRINGS Filed sept. 18, 1926 4 sheets-sheet 1 oct. 9, 192s. 1,687,476

D. HANAUER MACHINE FOR TYING KNOTS IN SPIRAL SPRINGS oct. 9, 192s, v1,687,476

D. HANAUER MACHINE FOR TYING KNOTS IN SPRAL SPRINGS Filed Sept. 18, 1926 4 Sheets-Sheet 5 Och 9, 1928.

- D. HANAUER MACHINE FOR TYING KNOTS IN SPIRAL SPRINGS Filed sept. 18, 1926 4 sheetsneex 4 Patented Get. 9, 1928.`

' lllTE STATES PATENT DARWIN HANAUIin, or LA GRANGE, ILLINOIS, AssreNon To KINNEY PANY, A conrcnATIoN or ILLINoIs.

1,687,476 err-1ct.

ROME COM- MACHINE non vrYINes KNo'rs IN srinnnV srnINGs.

Application filed September .18, 1926.` Serial No. 136,282.

The free end of the wire at the large end of a spiral spring such as used in spring cushions and bed springs is knotted or tied about the wire forming the upper coil or turn of the spring; this operation being performed in a. machine having a `table onkwhich the spring is set and an anvil adapted to be positioned between the free wire end and the turn or coil about which the Vknot is to be made.

Theioperatormust take pains to position the Generally speaking, the obj ect of the pres ent invention is to improve the construction of machines of the character described so asto increase their output and the accuracy of the vwork done thereby. i

The ob] ect of the present invention, viewed in one ofitsaspects, is so to'construct a machine ofthe character described that it will be much easier forV the operator to position springs on the same, using only one hand for the purpose. y 7

A further object of the' presentinvention is to produce a simple and novel attachment for the machine which will automatically clamp the spring to the supporting table and make v it unnecessary for theoperator to employ either of his hands to hold the spring in place while the knot is being tied'.

Machines of the typeunder consideration are` provided with a rocking work-supporting table that advances to receive the work and carries thev latter rearwardlypinto operativerelatio'n to the tying mechanism. I utilize y these movements ofthe tabl'e'to operate a clamp for holding the coil or turn ofthe spring that rests on the tablev-` and for shifting an anvil from an. idle posit-ion toa work-1 ing position. By retracting the anvil, it is removed from the path of a spring being set in place on the table and therefore the springs may be more quickly set in yplace than in the ordinary machine. y

The various features of novelty whereby my invention vis characterizedl will hereinafter be pointed out with particularity in the claims; but, for full understandingof'iny invention and'of its objects and advantages,

rcfefaeiice'niay' be had to the following" des y suitable base on which is supported a suitable slowingA down production.

tailed description taken in connection with the accompanying drawings, wherein:

F igure l is a top plan view of a machine equipped in'accordance with the present invention; Figs. 2 and 3 are side views of the machine showing the table in its two different eXtreme positions, together with a springresting on the table; Figs. 4 and 5 are similar vertical sections through the table, adjacent to the movable anvil, showing the anvil in two different positions; and Figs. 6 and 7 are top plan views of the parts shown in Figs. 4 and 5. f

Referring to thek drawings, 1 represents a frame structure 2. 3 is a Work supporting table fixed to the upper end of a swinging rocker 4; the rockerv being supported on a horizontal transverse pivot 5. The rocker has an arm 6 extending rearwardly from the up.

per end-thereof, and on this `arm is a cam roller 7 lying within 'a cam lgroove 80 on a seg- `mental gear 90 that is fixed to a transverse upper coil of the spring lying in a groove in the anvil. This makes 1t necessary carefully to insert the spring, an operation requiring careful attention by the workman and thus In accordance with my invention I make that portion of the anvil that lies in rear of the groove movable,

lso that it may be shifted out ofthe way while the spring is being set in place and then be returned .into its working position. This feature is best shown in Figs. l toiv ,Z.. Referring to these figures, the forward stationary part of the anvil is indicated at 8. The groove y' or seat "9 for thel last complete coil of the i spring isat the extreme rear end of this anvil.

In rear of the member 8 is al vertical movable `plunger l0 slidably fitted in asocket ll in the table'. The plunger 10 has a rod `12'extending Adownwardly therefrom, the rod being pro- Vvvided` at its lower end with a roller 13, and at a point above the roller witha ,collar 144 eomprcssion spring 'it' between the voi' the table i' collar 14 and the underside of the table. On a stationary part oi the machine, as best shown in Figs. 2 and 3, is an approximately horizontal shelf 1G on which the roller 13.

runs. The parts are so proportioned t yiat when the table is in its forward position,las shown in Fig. Q, the shelf 1G permits the spring 15 to Yi'oice theplunger l() down into the position shown in Figs. et and 6,'thus pen' niitting the sprinfr to be set in the groove 9 in the stationary a il without any interference on the part et the plunger 10.. Then, when the table is drawn toward the rear, as shown in Fig. 3, the roller 18 rides rearwardly on thc shelf or platjorm 16, forcing the rod or stein 12 and the plunger up into the position shown in Fi and 7, namely into the space between the free end oiC the wire of the spring A and the adjacent portion ci the last turn or coil ot this spring. Y

The s'econdvteatnre ot my invention has to do with means for automatically clampingthe spring on the table. To tliislend, l have pivotcd to the front end of the table, at one side,

:a vdog 1S whose nose 19 is adapted to swing between a position overlying the table, as shownin Fior 3 and a position raisedfro'm the vtable shown in Fig. 2. The dog has an 'eXtensionQO below its pivot point, vand in this extension is an elongated slot-21. A stationary bar 22 extends torwardftroin the traine worlr of the machine'and is 'provided with a pin 23 that entends through theslot Q1. guide rod Q4 is pivotally connected at its frontend to the dog 18, above its pivot point, and extends rearwardly through a statioiiar O'uide isinall coiled s rin T 26 is ,l b i C," attached at one end tothe pivotpinQ( for the dog A18, passesin front of and underneath the stationary pin 23, and has its other end fastened to the ex'tensionQO of the doo' at a ,E t.: point-:28 considerably in rear oithepin 23. This s ring tends consta-ntl to swinO' the clamping dog into locking position.

Consequently, as the table is rocked into its fior-ward position as shown in Fig,r 2,the nose ofthe dog is swung up. The movable anvil l l0 isat this time withdrawn below the top and therefore tbespring to'be 'operated upon may readily be set on the table,

or the one that has been operated on may read rily be removed. Villien a spring is set on the `tableandfthemachine set in operation so as to cause'the table to i'oclr towardthe rear, the

clan'iping dog is swung in thecountercloclr- Y wisedii'ection so that its nose will clamp down on the undermost coil o'l the springon they table andthus,lirmlyy hold the spring in place.`

1While the spring is being clampedA in xplace,

the n'iovableanvil or plunger 10v risesfso that made without further effort on the part ofy the workman.

(In ig. 6 the parts are Vshown lin the positions occupied by them when the table is tor- .placed in the machine much more quickly and easily Vthan liereinbetore and, for this reason, and for the iurther Areason that the springs areautomatically clamped on the-sup- .porting table, the outputV oit ar machine equipped iny accordance with my invention will be greatly increased over that of the ordinary machine.V

lfvlhile 1 have illustrated described with ypaiticularity only asingle'preterred torni of my invention, I do Anot desire toibe limited y to the exact'structural details thusl illustrated and described; but intend to cover Vallforms and arrangements 4which come within ythe deinitions ofiny invention constitutingthe appended claims. v

1. Ina machine-ot the character described, aI movable work-supporting table, 'an'anvil mounted on the table for'inoveinents between a 'position inwhich it .projects above thetable and ci-:position in which it is retracted below the table, and `means. controlled byinove-y ments oi the table to shiftthe anvil from one of its vpositionsto the other.

2. In a machine of thecharacter described,

wardly therefrom, a spring tending'to torce the anvil down,`and a stationary member in position to engage said steinand force the anvil up when the table Iis'roclred lin one d1- lrection.k f

4. In a machine of the character-described, a rockingtable, two anvil members arranged on said table one in front or' the Vother `and spaced apart a short distance from each other,

the rear anvil member extending through the table, and meansi'ormoving the ylatter anvil .member between a position in'which it projects above the table andja retracted yposition as the table rocks. f

5. In a machine ofthe character described, a work supporting table'movalole between a receiving position and a worlr treating posi- .,tiofn, knot-tying means. associated with said tab'le,fa clamp on said table remote Jfrom said when the table is in its retracted position,

knot-tying means, 'and means for automatically 4openingthe,clamp as the table ap `-proaches its receiving position andclosing the 'clainp as the table moves toward its work y treating position.

va rocking table, an anvil extending through :thetable, and. means orinoving the anvil between a .position in which it projects above the lOO spring, a table mounted to rock forward and back, said table being larger than tlie end of a spring in which a knot is to be tied, knottying means associated with the table, a clamp mounted on thetable at a point remote from the knot-tying means forV engagement with the lowermost turn of a spring resting on the table, and means for automatically closing the campas the table starts to rook toward the back and automatically opening the clamp when the table rocks forward.

tween a receiving position and a work treating position, an anvil member mounted, on the l table in position to lie between the free end of a spring resting on the table and the wire of the 'coil to which the free end is to be knotted, saidanvil member being movable between its working position and an idle position below the table, a clamp on the table at a point remote 'from said anvil member, and means for automatically closing. the clamp on the bottom wire of a spring resting on the table and moving said anvil member from its idle position to its working position as the table rocks from its receiving position to its work treating position.

In testimony whereof, I signthis speciication.

DARWIN HANAUER. 

